| Carthagena Lock | |
|---|---|
 Below the lock | |
 | |
| 51°44′37″N0°00′08″W / 51.743566°N 0.002108°W | |
| Waterway | River Lee Navigation |
| County | Hertfordshire Essex |
| Maintained by | Canal & River Trust |
| Operation | Manual |
| Length | 85 feet (25.9 m) |
| Width | 16 feet (4.9 m) |
| Fall | 5 feet (1.5 m) |
| Distance to Bow Creek | 17.5 miles (28.2 km) |
| Distance to Hertford Castle Weir | 8.8 miles (14.2 km) |
Carthagena Lock (No7) is a lock on the River Lee Navigation at Broxbourne
Directly behind the lock is Carthagena Weir part of a fishery which also includes two lakes and a section of the Old River Lea.
To the east of the lock is the Nazeing Mead complex of lakes which incorporate part of the River Lee Flood Relief Channel.
Vehicular access via B194 Nazeing New Road
Pedestrian and cycle access via the towpath which forms part of the Lea Valley Walk
There is a water point for boats. The tap is in the lock.
The River Lea is in the East of England and Greater London. It originates in Bedfordshire, in the Chiltern Hills, and flows southeast through Hertfordshire, along the Essex border and into Greater London, to meet the River Thames at Bow Creek. It is one of the largest rivers in London and the easternmost major tributary of the Thames.
The Lee Navigation is a canalised river incorporating the River Lea. It flows from Hertford Castle Weir to the River Thames at Bow Creek; its first lock is Hertford Lock and its last Bow Locks.
Epping Forest District is a local government district in Essex, England. It is named after the ancient woodland of Epping Forest, a large part of which lies within the district. The district covers northeastern parts of the London urban area, including the towns of Epping, Loughton, Waltham Abbey, Chigwell, and Buckhurst Hill, as well as rural areas beyond it. The district is situated in the west of the county, bordering north-eastern Greater London.
Enfield Lock is an area in the London Borough of Enfield, north London. It is approximately located east of the Hertford Road between Turkey Street and the Holmesdale Tunnel overpass, and extends to the River Lee Navigation, including the Enfield Island Village. The locality gains its name from the lock on the River Lee Navigation. Today's Enfield Lock was rebuilt in 1922. The area forms part of the Lee Valley Park and the Enfield Lock Conservation Area. On its eastern boundary Enfield Lock has marshland formerly used as a testing site between the Royal Small Arms Factory and the Gunpowder Mills, beyond this is the village of Sewardstone and the Epping forest boundary. To the south is Brimsdown, the north Waltham Cross and to the west Bullsmoor and Freezywater. Enfield Lock forms part of the London boundary.
The Lea Valley, the valley of the River Lea, has been used as a transport corridor, a source of sand and gravel, an industrial area, a water supply for London, and a recreational area. The London 2012 Summer Olympics were based in Stratford, in the Lower Lea Valley. It is important for London's water supply, as the source of the water transported by the New River aqueduct, but also as the location for the Lee Valley Reservoir Chain, stretching from Enfield through Tottenham and Walthamstow.
Nazeing is a village and parish in Essex, England. Within the parish are the separate settlements of Upper Nazeing, Middle Nazeing, and Lower Nazeing. The Prime Meridian passes to the west of Lower Nazeing.
The Lea Valley Walk is a 50-mile (80 km) long-distance path located between Leagrave, the source of the River Lea near Luton, and the Thames, at Limehouse Basin, Limehouse, east London. From its source much of the walk is rural. At Hertford the path follows the towpath of the River Lee Navigation, and it becomes increasingly urbanised as it approaches London. The walk was opened in 1993 and is waymarked throughout using a swan logo.
The Small River Lea is a minor tributary of the River Lea, which flows through the Lee Valley Park between Cheshunt and Enfield Lock. It forms part of the Turnford and Cheshunt Pits Site of Special Scientific Interest (SSSI) as it flows through the River Lee Country Park.
Carthagena Weir is a weir located at Broxbourne on the River Lea. The well oxygenated water with depths ranging to over 16 ft, makes it an ideal environment for coarse fish including the common barbel.
Kings Weir is a weir on the River Lea near Turnford and Nazeing in Hertfordshire, England.
The Lee Flood Relief Channel (FRC) is located in the Lea Valley and flows between Ware, Hertfordshire, and Stratford, east London. Work started on the channel in 1947 following major flooding and it was fully operational by 1976. The channel incorporates existing watercourses, lakes, and new channels. Water from the channel feeds the Lee Valley Reservoir Chain.
Waltham Town Lock is a lock on the River Lee Navigation at Waltham Cross, Hertfordshire. The lock is located in the River Lee Country Park which is part of the Lee Valley Park. The adjoining Showground site now known as the Broxbourne White Water Canoe Centre has been chosen to host the canoeing event in the 2012 Summer Olympics.
Waltham Common Lock is a lock on the River Lee Navigation at Waltham Cross in Hertfordshire, England. The lock is located in the River Lee Country Park and stands close to the Broxbourne White Water Canoe Centre. At the tail of the lock is the Powdermill Cut dug in 1806 to connect the Waltham Abbey Royal Gunpowder Mills directly to the then-new navigation.
The River Lee Country Park is located in the Lee Valley Park and is managed by the Lee Valley Regional Park Authority. Covering 1,000 acres (400 ha) on either side of the River Lee Navigation between Waltham Abbey and Broxbourne, it is an area of lakes, watercourses, open spaces and three Sites of Special Scientific Interest (SSSI) linked by footpaths and cycle tracks.
Aqueduct Lock is a lock on the River Lee Navigation close to Turnford.
Dobbs Weir Lock is a lock on the River Lee Navigation near Hoddesdon.
Feildes Weir Lock (No5) is a lock on the River Lee Navigation located in Hoddesdon.
The Broxbourne Mill Stream which diverges from the River Lee Navigation just south of Dobbs Weir, is one of the few remaining 'old river' loops of the River Lea, with a relatively natural channel form and a diverse range of habitats. Broxbourne developed as a small settlement for milling at a river crossing point at Broxbourne Mill. Spital Brook empties into the Mill Stream by Nazeing New Road.
Rammey Marsh is located in the Lee Valley Park at Enfield Lock, Enfield, England, and covers approximately 42 hectares. The site is owned and managed by the Lee Valley Regional Park Authority.
Broxbourne Rowing Club is a rowing club on the River Lea, based at Old Nazeing Road, Broxbourne, Hertfordshire.